search

Buy Octagon Shape 20x15 mm Gems

(53)
Octagon Shape 20x15 mm Gems Weight Octagon Shape 20x15 mm Gems Size Octagon Shape 20x15 mm Gems Clarity Octagon Shape 20x15 mm Gems Price Octagon Shape 20x15 mm Gems Origin
More
Octagon Shape 20x15 mm Gems Single
Octagon Shape 20x15 mm Gems Pairs
Octagon Shape 20x15 mm Gems Lots
Octagon Shape 20x15 mm Gems Faceted
Octagon Shape 20x15 mm Gems Cabochons
Sort By:
Clear All
Photos are of Actual Products for Sale

24.65ct Purplish Violet Amethyst

ID: 692347
Weight: 24.65ct
Size: 20.1 x 15.2 mm
Clarity: VS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 172.55
Item in Stock
More Options & Item Details
Add to Cart

21.43ct Deep Violet Amethyst

ID: 692715
Weight: 21.43ct
Size: 20.3 x 15.1 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 150.01
Item in Stock
More Options & Item Details
Add to Cart

24.15ct Deep Violet Amethyst

ID: 692505
Weight: 24.15ct
Size: 20 x 15.2 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 169.05
Item in Stock
More Options & Item Details
Add to Cart

22.72ct Medium Pinkish Violet Amethyst

ID: 692721
Weight: 22.72ct
Size: 20.1 x 15.1 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 159.04
Item in Stock
More Options & Item Details
Add to Cart

18.67ct Pinkish Violet Amethyst

ID: 716441
Weight: 18.67ct
Size: 19.5 x 14.7 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 149.36
Item in Stock
More Options & Item Details
Add to Cart

40.49ctw Black Gray Hematite

ID: 491896
Weight: 40.49ct (total)
Size: 20.2 x 15 mm
Clarity: Opaque
Content: 2 pcs
Shape: Octagon Cabochon
Treatment: Untreated
Origin: Brazil
Type: Natural Hematite
Price: $ 36.04
Item in Stock
More Options & Item Details
Add to Cart

21.42ct Medium Grey Hematite

ID: 555562
Weight: 21.42ct
Size: 20.6 x 15.1 mm
Clarity: Opaque
Content: 1 pc
Shape: Octagon Cabochon
Treatment: Untreated
Origin: Brazil
Type: Natural Hematite
Price: $ 21.68
Item in Stock
More Options & Item Details
Add to Cart

21.82ct Deep Violet Amethyst

ID: 692513
Weight: 21.82ct
Size: 20.1 x 15 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 152.74
Item in Stock
More Options & Item Details
Add to Cart

23.50ct Pinkish Violet Amethyst

ID: 692722
Weight: 23.50ct
Size: 20.3 x 15.2 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 164.50
Item in Stock
More Options & Item Details
Add to Cart

25.94ct Schorl Tourmaline

ID: 701486
Weight: 25.94ct
Size: 19.9 x 14.5 mm
Clarity: Opaque
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Mozambique
Type: Natural Tourmaline
Price: $ 129.70
Item in Stock
More Options & Item Details
Add to Cart

24.01ct Medium Light Purplish-Violet Amethyst

ID: 692911
Weight: 24.01ct
Size: 20.2 x 15.1 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 168.07
Item in Stock
More Options & Item Details
Add to Cart

23.19ct Purplish Violet Amethyst

ID: 692354
Weight: 23.19ct
Size: 20 x 15.1 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 162.33
Item in Stock
More Options & Item Details
Add to Cart

19.55ct Silver Gray Hematite

ID: 515494
Weight: 19.55ct
Size: 20.6 x 15 mm
Clarity: Opaque
Content: 1 pc
Shape: Octagon Cabochon
Treatment: Untreated
Origin: Brazil
Type: Natural Hematite
Price: $ 21.51
Item in Stock
More Options & Item Details
Add to Cart

22.42ct Medium Violet Amethyst

ID: 692723
Weight: 22.42ct
Size: 20.1 x 14.9 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 156.94
Item in Stock
More Options & Item Details
Add to Cart

23.68ct Purplish Violet Amethyst

ID: 692717
Weight: 23.68ct
Size: 20.2 x 15.2 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 165.76
Item in Stock
More Options & Item Details
Add to Cart

20.89ct Medium Light Purplish-Violet Amethyst

ID: 692353
Weight: 20.89ct
Size: 20.1 x 15 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 146.23
Item in Stock
More Options & Item Details
Add to Cart

22.52ct Deep Violet Amethyst

ID: 692358
Weight: 22.52ct
Size: 20.1 x 15.1 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 157.64
Item in Stock
More Options & Item Details
Add to Cart

17.55ct Medium Grey Hematite

ID: 515489
Weight: 17.55ct
Size: 19.7 x 14.4 mm
Clarity: Opaque
Content: 1 pc
Shape: Octagon Cabochon
Treatment: Untreated
Origin: Brazil
Type: Natural Hematite
Price: $ 19.31
Item in Stock
More Options & Item Details
Add to Cart

41.25ctw Black Gray Hematite

ID: 491902
Weight: 41.25ct (total)
Size: 19.8 x 15.1 mm
Clarity: Opaque
Content: 2 pcs
Shape: Octagon Cabochon
Treatment: Untreated
Origin: Brazil
Type: Natural Hematite
Price: $ 40.38
Item in Stock
More Options & Item Details
Add to Cart

23.51ct Medium Purplish Violet Amethyst

ID: 692718
Weight: 23.51ct
Size: 20.2 x 15.1 mm
Clarity: VVS-VS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 164.57
Item in Stock
More Options & Item Details
Add to Cart

21.90ct Medium Light Purplish-Violet Amethyst

ID: 692352
Weight: 21.90ct
Size: 20.2 x 15.3 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 153.30
Item in Stock
More Options & Item Details
Add to Cart

25.46ct Medium Light Purplish-Violet Amethyst

ID: 692512
Weight: 25.46ct
Size: 20.1 x 15.3 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 178.22
Item in Stock
More Options & Item Details
Add to Cart

19.16ct Purplish Violet Amethyst

ID: 692912
Weight: 19.16ct
Size: 20.1 x 15 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 134.12
Item in Stock
More Options & Item Details
Add to Cart

24.08ct Intense Violet Amethyst

ID: 692713
Weight: 24.08ct
Size: 20.2 x 15.1 mm
Clarity: VVS-VS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 168.56
Item in Stock
More Options & Item Details
Add to Cart

22.46ct Medium Light Purplish-Violet Amethyst

ID: 692504
Weight: 22.46ct
Size: 20.2 x 15.1 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 157.22
Item in Stock
More Options & Item Details
Add to Cart

21.16ct Pinkish Violet Amethyst

ID: 692719
Weight: 21.16ct
Size: 20 x 15.2 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 148.12
Item in Stock
More Options & Item Details
Add to Cart

29.93ct Hot Pink Kunzite

ID: 695901
Weight: 29.93ct
Size: 19.5 x 15 mm
Clarity: VS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Afghanistan
Type: Natural Kunzite
Price: $ 748.25
Item in Stock
More Options & Item Details
Add to Cart

22.77ct Medium Light Purplish-Violet Amethyst

ID: 692357
Weight: 22.77ct
Size: 19.9 x 15 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 159.39
Item in Stock
More Options & Item Details
Add to Cart

22.54ct Medium Light Purplish-Violet Amethyst

ID: 692913
Weight: 22.54ct
Size: 20 x 15.2 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 157.78
Item in Stock
More Options & Item Details
Add to Cart

22.71ct Purplish Violet Amethyst

ID: 692510
Weight: 22.71ct
Size: 20.2 x 15.3 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 158.97
Item in Stock
More Options & Item Details
Add to Cart

36.84ctw Black Gray Hematite

ID: 491900
Weight: 36.84ct (total)
Size: 19.2 x 14.6 mm
Clarity: Opaque
Content: 2 pcs
Shape: Octagon Cabochon
Treatment: Untreated
Origin: Brazil
Type: Natural Hematite
Price: $ 32.79
Item in Stock
More Options & Item Details
Add to Cart

19.67ct Medium Grey Hematite

ID: 515497
Weight: 19.67ct
Size: 19.9 x 15.2 mm
Clarity: Opaque
Content: 1 pc
Shape: Octagon Cabochon
Treatment: Untreated
Origin: Brazil
Type: Natural Hematite
Price: $ 21.64
Item in Stock
More Options & Item Details
Add to Cart

20.96ct Medium Violet Amethyst

ID: 692503
Weight: 20.96ct
Size: 20.2 x 14.9 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 146.72
Item in Stock
More Options & Item Details
Add to Cart

17.51ct Vivid Violet Amethyst

ID: 692720
Weight: 17.51ct
Size: 19.4 x 14.6 mm
Clarity: VVS-VS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 122.57
Item in Stock
More Options & Item Details
Add to Cart

37.51ctw Dark Gray Hematite

ID: 491895
Weight: 37.51ct (total)
Size: 19.5 x 14.9 mm
Clarity: Opaque
Content: 2 pcs
Shape: Octagon Cabochon
Treatment: Untreated
Origin: Brazil
Type: Natural Hematite
Price: $ 36.72
Item in Stock
More Options & Item Details
Add to Cart

34.87ctw Black Gray Hematite

ID: 491893
Weight: 34.87ct (total)
Size: 19.4 x 15.1 mm
Clarity: Opaque
Content: 2 pcs
Shape: Octagon Cabochon
Treatment: Untreated
Origin: Brazil
Type: Natural Hematite
Price: $ 34.13
Item in Stock
More Options & Item Details
Add to Cart

18.39ct Medium Light Purplish-Violet Amethyst

ID: 692355
Weight: 18.39ct
Size: 20.1 x 15.1 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 128.73
Item in Stock
More Options & Item Details
Add to Cart

21.50ct Pinkish Violet Amethyst

ID: 692509
Weight: 21.50ct
Size: 20 x 15.1 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 150.50
Item in Stock
More Options & Item Details
Add to Cart

24.25ct Deep Violet Amethyst

ID: 692508
Weight: 24.25ct
Size: 20.1 x 15.1 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 169.75
Item in Stock
More Options & Item Details
Add to Cart

22.70ct Medium Violet Amethyst

ID: 692514
Weight: 22.70ct
Size: 19.9 x 15.1 mm
Clarity: VVS-VS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 158.90
Item in Stock
More Options & Item Details
Add to Cart

22.47ct Medium Pinkish Violet Amethyst

ID: 715394
Weight: 22.47ct
Size: 19.8 x 15.1 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 179.76
Item in Stock
More Options & Item Details
Add to Cart

23.96ct Medium Light Purplish-Violet Amethyst

ID: 692348
Weight: 23.96ct
Size: 20.3 x 15.2 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 167.72
Item in Stock
More Options & Item Details
Add to Cart

22.65ct Purplish Violet Amethyst

ID: 692716
Weight: 22.65ct
Size: 20.1 x 15.1 mm
Clarity: VVS-VS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 158.55
Item in Stock
More Options & Item Details
Add to Cart

22.20ct Medium Pinkish Violet Amethyst

ID: 715400
Weight: 22.20ct
Size: 19.9 x 14.9 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 177.60
Item in Stock
More Options & Item Details
Add to Cart

24.90ct Pinkish Violet Amethyst

ID: 692915
Weight: 24.90ct
Size: 20.2 x 15.1 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 174.30
Item in Stock
More Options & Item Details
Add to Cart

24.96ct Medium Violet Amethyst

ID: 692712
Weight: 24.96ct
Size: 20 x 15.1 mm
Clarity: VVS-VS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 174.72
Item in Stock
More Options & Item Details
Add to Cart

20.24ct Medium Light Purplish-Violet Amethyst

ID: 692507
Weight: 20.24ct
Size: 20.1 x 15.1 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 141.68
Item in Stock
More Options & Item Details
Add to Cart

22.05ct Medium Light Purplish-Violet Amethyst

ID: 692511
Weight: 22.05ct
Size: 20 x 15 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 154.35
Item in Stock
More Options & Item Details
Add to Cart

21.61ct Iris Violet Amethyst

ID: 692910
Weight: 21.61ct
Size: 19.9 x 15.3 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 151.27
Item in Stock
More Options & Item Details
Add to Cart

22.92ct Medium Light Purplish-Violet Amethyst

ID: 692506
Weight: 22.92ct
Size: 20.1 x 15.1 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 160.44
Item in Stock
More Options & Item Details
Add to Cart

22.11ct Pinkish Violet Amethyst

ID: 716438
Weight: 22.11ct
Size: 20 x 15.1 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 176.88
Item in Stock
More Options & Item Details
Add to Cart

24.54ct Medium Pink Violet Amethyst

ID: 692914
Weight: 24.54ct
Size: 20.3 x 15.2 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 171.78
Item in Stock
More Options & Item Details
Add to Cart

21.40ct Medium Light Purplish-Violet Amethyst

ID: 692356
Weight: 21.40ct
Size: 20.1 x 15.2 mm
Clarity: VVS
Content: 1 pc
Shape: Octagon Step Cut
Treatment: Untreated
Origin: Brazil
Type: Natural Amethyst
Price: $ 149.80
Item in Stock
More Options & Item Details
Add to Cart

Some people by gems by color or price, but for many, it is best to buy gems by shape and size - especially if you're in need of a gem to replace a previous item that was lost or damaged. Calibrated Octagon shape / Emerald-Cut, faceted and cabochon gems available now in 20 x 15 mm size range. Shop a wide range of calibrated gemstones by size online at wholesale from GemSelect.

As a general guideline, when it comes to 'calibrated' gems, they are not usually expected to be cut to exact measurements. For calibrated gemstones weighing under one carat, most jewelry settings will accommodate a gem which is within 0.2 mm of the calibrated size in order to fit a standard setting. For gemstones that weigh over one carat, a larger variance is acceptable, often round shape settings will allow 0.3 mm or slightly higher even. This small variance can usually be accommodated for most standard style settings. Round-cut gemstones should also have a greater variance in acceptable size when it comes to calibration; in fact it is usually possible to mount a round stone of any size in the closest standard setting.

Read All

Over 19 Years in the Gemstone Business!

Thank you for trusting us with your purchase!

Overall Rating -> 10 star ratings

this was very easy im exited to get my order

Posted By Mr. in April, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

Everthing about researching and ordering from Gemselect was easy and uncomplicated. In the past I had payment problems, but your customer rep, Thomas, helped me get everything right. I will continue using Gemselet in the future for these reasons.

Posted By WildwillyfromArizona in August, 2023
Source: Bizrate

Overall Rating -> 10 star ratings

Very excited and impressed with all your products. Keep up the good work....more different stones to choose from. I like Cabachons.

Posted By Meow in June, 2023
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to find products I want. I've ordered several times from gem select and never any problems. Will order again. Thank you.

Posted By Ray in January, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

The website is user friendly, has excellent selection. I've always found what I was looking for with Gem Select. When others don't have it they do. And most important, they have a way for you to pay without using PayPal. I cannot use PayPal they closed my account because of no cell phone.

Posted By NJD in September, 2023
Source: Bizrate

Overall Rating -> 10 star ratings

I enjoyed browsing though different varieties of rubies. I felt that the experience was simple and easy to navigate!

Posted By Daws in July, 2023
Source: Bizrate

Overall Rating -> 10 star ratings

Very good, very fast, everything as described.

Posted By B in October, 2023
Source: Bizrate

Overall Rating -> 10 star ratings

Great selection, I love your site! Great product visibility, information, etc.

Posted By John in February, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

The website is easy to search, the variety of gems is excellent and the educational information is interesting and helpful! Love browsing and shopping the GemSelect website!

Posted By Happiness in January, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

Great site

Posted By Lord of Bananas in November, 2023
Source: Bizrate

Overall Rating -> 10 star ratings

great. thank you

Posted By Carrotroller in July, 2023
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to use website, made it very easy to buy. Will shop here again.

Posted By Bjorn in January, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

Wonderful selection of gems to choose from. Have made many purchases and was only slightly disappointed once.

Posted By Teemo in February, 2024
Source: Bizrate

Overall Rating -> 10 star ratings

I love the clear description of the certification options. It's very rare to see a gem site that offers a deep explanation of each institution that would certify the stone(s).

Posted By Oakcityceo in May, 2023
Source: Bizrate

Overall Rating -> 10 star ratings

Pleasant.

Posted By Mk in November, 2023
Source: Bizrate
STAY IN TOUCH | NEWSLETTER
*You're signing up to receive GemSelect promotional email.
Partners and Trust Payment options

Switch to Mobile Version

Copyright © 2005-2024 GemSelect.com all rights reserved.

Reproduction (text or graphics) without the express written consent of GemSelect.com (SETT Company Ltd.) is strictly prohibited.

967